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Q. `NaNO_2` (alkaline solution) `----->` gas + `Na_2ZnO_2` .The gas...

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user8235304 | Student, Grade 11 | Valedictorian

Posted July 17, 2013 at 3:08 AM via web

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Q. `NaNO_2` (alkaline solution) `----->` gas + `Na_2ZnO_2` .The gas is:-                                          (Zn powder,`Delta` )

 

A)`N_2`

B)`N_2O`

C)`NO_2`

D)`NH_3`

 

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jerichorayel | College Teacher | (Level 1) Senior Educator

Posted July 17, 2013 at 9:40 AM (Answer #1)

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Usually the reaction of `NaNO_2 ` is made from the alkaline solution of `NaOH` . If we used `NaOH ` as the alkali solution the reaction can be written as:

`NaNO_2 + Zn + NaOH -> Na_2ZnO_2 + H_2O + NH_3`

NaNO2 reacts with Zinc powder in an alkali solution will produce the `Na_2ZnO_2` . `NH_3 ` is liberated in the reaction in the form of gas.

Answer: D.) `NH_3`

The balanced equation can be written as:

 

`NaNO_2 + 3 Zn + 5 NaOH -> 3 Na_2ZnO_2 + H_2O + NH_3 `

 

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